From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754542Ab1IOFnz (ORCPT ); Thu, 15 Sep 2011 01:43:55 -0400 Received: from home.keithp.com ([63.227.221.253]:45768 "EHLO keithp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754469Ab1IOFny (ORCPT ); Thu, 15 Sep 2011 01:43:54 -0400 From: Keith Packard To: Samuel Thibault , dri-devel@lists.freedesktop.org Cc: linux-kernel@vger.kernel.org Subject: Re: [REGRESSION] i915 KMS dual head broken on DELL latitude E6420 in 3.1-rc* In-Reply-To: <20110914232717.GA5410@type.famille.thibault.fr> References: <20110914232717.GA5410@type.famille.thibault.fr> User-Agent: Notmuch/0.6.1-66-ga900dda (http://notmuchmail.org) Emacs/23.3.1 (i486-pc-linux-gnu) Date: Thu, 15 Sep 2011 00:43:36 -0500 Message-ID: MIME-Version: 1.0 Content-Type: multipart/signed; boundary="=-=-="; micalg=pgp-sha1; protocol="application/pgp-signature" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --=-=-= Content-Transfer-Encoding: quoted-printable On Thu, 15 Sep 2011 01:27:17 +0200, Samuel Thibault wrote: Non-text part: multipart/mixed > Hello, >=20 > I'm trying to upgrade from 3.0 to 3.1-rcsomething on a DELL latitude > E6420, but dual head is broken. Here is the scenario: >=20 > - Turn computer on with VGA1 connected. Both LVDS1 and VGA1 show the > text console fine. > - Start X. VGA1 shows X fine, but LVDS1 (1600x900 resolution) shows an > odd screen: completely black on the left part (about 1060x900), sort > of gray on the right part (about 540x900). Playing with xrandr doesn't > help, I can at best make it completely black with --off, and not get > it back again with --auto or anything else. Can you try disabling frame buffer compression? i915.i915_enable-fbc=3D0 I'm about to send a patch to disable this by default; I've gotten two people saying that this helps them already. =2D-=20 keith.packard@intel.com --=-=-= Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iD8DBQFOcZCIQp8BWwlsTdMRAuzwAKCdGZYbx8Wipsl/lgW1+3SWvxp4QACdHNUv FXjT0sNv41C76Q6ZeEPloXU= =i691 -----END PGP SIGNATURE----- --=-=-=--